Specifications

HYDROLOGICAL SERVICES
DL3 100-038 IMP
Issue 2: 15/11/2005
5. Specification
5.1 Hardware Specification
5.1.1. General
Microprocessor Intel 80C196
Program Memory AMD29F010 128KB Flash EPROM (PLCC28)
(64KB Available for program)
Data Memory (On board) AMD29F010 128KB Flash EPROM (PLCC28)
(Min of 100,000 erase/write cycles)
Parameter Memory PCF8594 512 Bytes EEPROM (SO8)
(Min of 100,000 erase/write cycles)
Events Recorded 1 second resolution.
2 bytes per event.
Typical 112KB -> 52,000 events total
(includes overheads for 1 year)
(Memory partitions give rain and
river event splits as follows :-
39,000 rain events max +15,600 river events,
through to
15,600 rain events + 39,000 river events max)
Real Time Clock Day/Month/Year Hour/Minute/Second
Battery backed with Lithium Cell
32768 Hz crystal trimmable
Accuracy approx. 20 secs per month
Programmable alarm wakeup.
Inputs 1 x Digital rain gauge input
1 x Digital quadrature shaft encoder input
Optically Isolated expansion port for
smart sensors > 4-20mA, 0-5v etc...
Outputs 1 x O.C. output for sensor control
1 x Batt. switched output for modem power
Indicators LED indicator to show a change has
been recognised / logged.
Communications RS232 Port (Tx, Rx, DTR and CD)
Hardware handshake or Xon/Xoff.
Mini modem power control.